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Keep 2 videos in sync with time

post #1 of 3
Thread Starter 
I have a series of lectures I want/need to watch for some classes, and I have them in a weird format. Each lecture is made of two FLV files of exactly the same length, one is a hi def recording of the digital whiteboard being written on, the other is a very low def recording of the professor sitting there writing on it. The audio of the professor talking is in the low def video, the hi def recording of the whiteboard contains no audio.

So far, I've been opening them both at the same time in SMPlayer and minimizing the video of the professor so I can still hear the audio while I watch the whiteboard. This works decently enough, but becomes a pain if I want to skip a bit (which happens a lot, since these particular courses are about half review, half new material for me). So I'd like an easier way to do this.

Is there an easy way I can add audio from one video track to another, preferably in batch? That failing, is there a program that will open two different video files and keep them in sync through time as one skips around?

tl;dr: need to either keep two different video files of the same length playing in sync even when skipping around, or batch add audio from one video to another

Thanks in advance for any help

EDIT: If there's a program that can somehow take two videos and stick them into one file, side by side, that would work as well
Edited by tommy1993 - 10/18/11 at 4:32pm
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post #2 of 3
I would take a look at something like Sony Vegas which is a movie finishing program. I don't know if it'll handle FLV out of the box (there are free converters, or I'm sure there's a plugin for it), but you can insert both movies into independent tracks, hide the video of the professor lecturing and either watch the movie in Vegas' preview window, or render it out to a single video to watch when/where ever you want.
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post #3 of 3
Thread Starter 
perfect! thanks, +rep
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